Geological substrates shape tree species and trait distributions in African moist forests.
Geological substrates shape tree species and trait distributions in African moist forests.
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DOI：
10.1371/journal.pone.0042381
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Gourlet-Fleury S
中科院分区：
文献类型：
--
作者：
Fayolle A;Engelbrecht B;Freycon V;Mortier F;Swaine M;Réjou-Méchain M;Doucet JL;Fauvet N;Cornu G;Gourlet-Fleury S
了解热带树种在大尺度上的分布是生态学、保护和森林管理的核心问题。本研究的目的是（一）评估的重要性，相对于历史因素的环境因素在北方刚果盆地的半常绿森林树种分布;和（二）确定潜在的机制，通过基于特征的方法解释分布格局。我们分析了31个常见树种的分布模式，在超过70万平方公里的面积跨越喀麦隆，中非共和国和刚果共和国的边界使用森林资源调查数据从56,445 0.5公顷的地块。环境（气候、地形和地质）和历史因素（人为干扰）的空间变化从地图和卫星记录中量化。从文献中提取了四个关键功能性状（叶物候，耐荫性，木材密度和最大生长速率）。地质底质对重点物种的分布至关重要，而气候和过去的人类干扰则有重大但较小的影响。物种分布格局与功能性状显著相关。与典型的砂岩和冲积层的桑迪土壤相关的物种的特点是生长速度慢，耐荫性，万年青叶，高木材密度，性状允许持久性资源贫乏的土壤。相反，快速增长的先锋种很少出现在桑迪土壤，除了Lophira阿拉塔。结果表明，强大的环境过滤，由于不同的土壤资源的可用性在地质基板。此外，资源丰富地区的长期人为干扰可能加剧了观察到的物种和性状分布模式。不同地质基质的性状差异意味着种群和生态系统过程的显著差异，并要求采取不同的保护和管理策略。
Understanding the factors that shape the distribution of tropical tree species at large scales is a central issue in ecology, conservation and forest management. The aims of this study were to (i) assess the importance of environmental factors relative to historical factors for tree species distributions in the semi-evergreen forests of the northern Congo basin; and to (ii) identify potential mechanisms explaining distribution patterns through a trait-based approach. We analyzed the distribution patterns of 31 common tree species in an area of more than 700,000 km2 spanning the borders of Cameroon, the Central African Republic, and the Republic of Congo using forest inventory data from 56,445 0.5-ha plots. Spatial variation of environmental (climate, topography and geology) and historical factors (human disturbance) were quantified from maps and satellite records. Four key functional traits (leaf phenology, shade tolerance, wood density, and maximum growth rate) were extracted from the literature. The geological substrate was of major importance for the distribution of the focal species, while climate and past human disturbances had a significant but lesser impact. Species distribution patterns were significantly related to functional traits. Species associated with sandy soils typical of sandstone and alluvium were characterized by slow growth rates, shade tolerance, evergreen leaves, and high wood density, traits allowing persistence on resource-poor soils. In contrast, fast-growing pioneer species rarely occurred on sandy soils, except for Lophira alata. The results indicate strong environmental filtering due to differential soil resource availability across geological substrates. Additionally, long-term human disturbances in resource-rich areas may have accentuated the observed patterns of species and trait distributions. Trait differences across geological substrates imply pronounced differences in population and ecosystem processes, and call for different conservation and management strategies.
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影响因子：
4.8
作者：
Hall, JS;McKenna, JJ;Gregoire, TG
通讯作者：
Gregoire, TG
DOI：
10.1007/bf00034341
发表时间：
1995-10-01
期刊：
VEGETATIO
影响因子：
--
作者：
DUIVENVOORDEN, JF
通讯作者：
DUIVENVOORDEN, JF
影响因子：
5.5
作者：
Clark, DB;Clark, DA;Read, JM
通讯作者：
Read, JM
影响因子：
2.7
作者：
Hacke, UG;Sperry, JS;McCulloch, KA
通讯作者：
McCulloch, KA
影响因子：
64.8
作者：
Engelbrecht, Bettina M. J.;Comita, Liza S.;Hubbell, Stephen P.
通讯作者：
Hubbell, Stephen P.